This is equal to entry <math>k</math> in row of <math>n</math> of Pascal's triangle. Rather than performing the multiplicative calculation, one can simply look up the appropriate entry in the triangle (constructed by additions). For example, suppose 3 workers need to be hired from among 7 candidates; then the number of possible hiring choices is 7 choose 3, the entry 3 in row 7 of the above table, which is <math> \tbinom{7}{3}=35 </math>.<ref>{{Cite web |url=http://5010.mathed.usu.edu/Fall2018/HWheeler/probability.html |access-date=2023-06-01 |website=5010.mathed.usu.edu|title=Pascal's Triangle in Probability}}</ref>
== Relation to binomial distribution and convolutions ==
